* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

a {
    color: #1890ff;
    text-decoration: none;
}

a:hover {
    color: #40a9ff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    height: 70px;
}

.site-name {
    font-size: 24px;
    font-weight: 600;
    color: #1890ff;
}

.banner-section {
    background: #f5f5f5;
}

.banner-container {
    position: relative;
    max-width: 1920px;
    margin: 0 auto;
    overflow: hidden;
}

.banner-wrapper {
    position: relative;
    width: 100%;
}

.banner-slide {
    display: none;
    position: relative;
}

.banner-slide.active {
    display: block;
}

.banner-slide img {
    width: 100%;
    height: auto;
    aspect-ratio: 1920 / 1080;
    object-fit: cover;
}

.banner-slide a {
    display: block;
}

.banner-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: #fff;
    font-size: 24px;
    font-weight: 500;
}

.banner-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    pointer-events: none;
}

.banner-prev,
.banner-next {
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: none;
    padding: 15px 20px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.3s;
    pointer-events: auto;
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(0, 0, 0, 0.8);
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
}

.dot.active,
.dot:hover {
    background: #fff;
}

.main-content {
    padding: 60px 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #1890ff;
    display: inline-block;
    margin-bottom: 0;
}

.contact-btn {
    background: #1890ff;
    color: #fff;
    border: none;
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.contact-btn:hover {
    background: #40a9ff;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.article-link {
    display: flex;
    padding: 20px;
    gap: 20px;
}

.article-thumbnail {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    border-radius: 4px;
    overflow: hidden;
}

.article-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.no-thumbnail {
    width: 100%;
    height: 100%;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 12px;
}

.article-info {
    flex: 1;
    min-width: 0;
}

.article-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.article-excerpt {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.empty-message {
    text-align: center;
    padding: 60px;
    color: #999;
    font-size: 16px;
}

.article-detail {
    padding: 40px 0 60px;
}

.article-content {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 40px;
}

.article-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.article-header .article-title {
    font-size: 28px;
    margin-bottom: 15px;
    white-space: normal;
}

.article-meta {
    color: #999;
    font-size: 14px;
}

.article-thumbnail-large {
    margin-top: 20px;
    text-align: center;
}

.article-thumbnail-large img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

.article-body {
    font-size: 16px;
    line-height: 1.8;
    color: #333;
}

.article-body h1,
.article-body h2,
.article-body h3 {
    margin: 25px 0 15px;
    font-weight: 600;
}

.article-body h1 {
    font-size: 24px;
}

.article-body h2 {
    font-size: 22px;
}

.article-body h3 {
    font-size: 20px;
}

.article-body p {
    margin-bottom: 15px;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 15px 0;
}

.article-body a {
    color: #1890ff;
    text-decoration: underline;
}

.article-body ul,
.article-body ol {
    margin: 15px 0;
    padding-left: 30px;
}

.article-body li {
    margin-bottom: 8px;
}

.article-actions {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.btn-back {
    display: inline-block;
    padding: 10px 30px;
    background: #1890ff;
    color: #fff;
    border-radius: 4px;
    font-size: 14px;
    transition: background 0.3s;
}

.btn-back:hover {
    background: #40a9ff;
    color: #fff;
}

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-box {
    background: #fff;
    border-radius: 8px;
    padding: 30px;
    width: 90%;
    max-width: 400px;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 24px;
    color: #999;
    cursor: pointer;
}

.modal-close:hover {
    color: #333;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    text-align: center;
    margin-bottom: 25px;
    line-height: 1.5;
}

.modal-form-group {
    margin-bottom: 20px;
}

.modal-form-group label {
    display: block;
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}

.modal-form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.modal-form-group input:focus {
    outline: none;
    border-color: #1890ff;
}

.modal-submit-btn {
    width: 100%;
    padding: 12px;
    background: #1890ff;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

.modal-submit-btn:hover {
    background: #40a9ff;
}

.success-box {
    text-align: center;
}

.success-icon {
    width: 60px;
    height: 60px;
    background: #52c41a;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin: 0 auto 20px;
}

.success-title {
    font-size: 20px;
    color: #333;
    margin-bottom: 10px;
}

.success-text {
    color: #666;
    margin-bottom: 20px;
}

.site-footer {
    background: #333;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.site-footer p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 768px) {
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .contact-btn {
        width: 100%;
    }
    
    .article-link {
        flex-direction: column;
    }
    
    .article-thumbnail {
        width: 100%;
        height: 200px;
    }
    
    .article-content {
        padding: 20px;
    }
    
    .article-header .article-title {
        font-size: 22px;
    }
}